#4D4D4D

CSS

:root {
  --shady-character: #4d4d4d;
  --shady-character-rgb: 77 77 77;
  --shady-character-oklch: oklch(0.42 0 0);
}

.element {
  color: var(--shady-character);
  background-color: hsl(0 0% 30%);
  border-color: oklch(0.42 0 0);
}

Tailwind CSS v4

@theme {
  --color-shady-character: #4d4d4d;
  --color-shady-character-50: #f5f5f5;
  --color-shady-character-100: #e8e8e8;
  --color-shady-character-200: #d4d4d4;
  --color-shady-character-300: #b7b7b7;
  --color-shady-character-400: #9e9e9e;
  --color-shady-character-500: #868686;
  --color-shady-character-600: #717171;
  --color-shady-character-700: #5b5b5b;
  --color-shady-character-800: #424242;
  --color-shady-character-900: #2e2e2e;
  --color-shady-character-950: #1b1b1b;
}

SCSS

$shady-character: #4d4d4d;
$shady-character-rgb: 77, 77, 77;
$shady-character-light: mix(#fff, $shady-character, 20%);
$shady-character-dark: mix(#000, $shady-character, 20%);

.element {
  color: $shady-character;
  box-shadow: 0 0 0 2px rgba($shady-character, 0.35);
}